BS 5975 2019 Extract - Flipbook - Page 61
BRITISH STANDARD
BS 5975:2019
o)
site investigation data and reports relating to the areas under and adjacent to the foundations
of the temporary works or proposed excavations; this should include information on all
underground and over-head services;
p)
specific requirements including any limitations on the staged construction of the works due to
positioning of construction joints, sequence of separate pours, rate of successive pours, timing of
post-tensioning and removal of supports;
q)
any requirements for pre-cambering or residual camber;
r)
loads that might be induced in the temporary works by permanent works that have been
completed, such as the application of staged post-tensioning, load re-distribution and any
movements of significance including any settlements or deflections that can be anticipated from
the permanent works as load is progressively increased;
s)
any limitations stated by the PWD on the position and extent of loads imposed by the temporary
works onto elements of the permanent works which have been constructed, such as loads
imposed by successive floors of multi-storey construction onto lower floors or loading of
permanent foundations required to support the temporary works;
t)
any limitations on the positioning of loads from temporary works over underground services or
voids, adjacent to excavations or retaining walls forming part of the permanent works;
u)
proposals for the protection of the temporary works, including its foundations, against
disturbance or impact;
v)
limitations imposed by various authorities in relation to working within or adjacent to railways,
highways, water-courses, etc.;
w) any environmental constraints placed on the site by the local authority or other body, for
example a requirement by the local authority to limit noise to certain hours of the day;
x)
details of obstructions that might preclude or influence the position of the temporary works;
y)
requirements for design deliverables from the TWD and the format of the design output; and
z)
proposed level of design check category.
NOTE 2 The information required might need to be obtained from various sources, and might include data from
earlier site operations or details of existing structures. Certain information might be of direct relevance to both the
permanent works designer and the temporary works designer, such as site investigation information or where the
temporary works affect or take support from the permanent works.
13.2.5
The TWD should be provided with a design brief, irrespective of whether they are from the
construction organization or not.
NOTE Some of the required information might only be available from other designers. Attention is drawn to the
responsibility of designers under the CDM Regulations 2015 [1] to co-operate with the PD and any other designer.
13.3
Design guidance
13.3.1
Those responsible for the design of a temporary works scheme should base their design on the
previously agreed design brief (see 13.2).
13.3.2
If the designer is not able to fully accommodate the requirements of the design brief, then any
proposed modifications should be drawn to the attention of the PC9s TWC or TWC as appropriate, as
soon as the changes are identified and the design brief amended.
13.3.3
The TWD should choose the appropriate design standards and other technical guidance.
NOTE Where codes of practice are specified by the contract or design brief, the TWD may seek authority to use
other equivalent codes providing equivalent (or better) factors of safety.
© THE BRITISH STANDARDS INSTITUTION 2019 3 ALL RIGHTS RESERVED#53
